We sell PIC, Datcon, Stewart Warner, ISSPRO and VDO pressure gauges. Electric pressure gauges require a sender (or sometimes called sensor) for signal source. You must match the electrical pressure gauge to its matching sensor, so a VDO pressure gauge should use a VDO pressure sender. Mechanical pressure gauges require a standard Pressure Tube Kit to provide the signal source. The tube may be cut to length as needed (unlike mechanical temperature gauge cables). All pressure tube kits work with virtually all mechanical pressure gauges.